This is Best Buy's High Quality High Insulation Flexible Ducting and it will not Deteriorate in the hot attic's like most all Black Plastic Flexible ducting.

Product Specifications:

As the second generation of acoustical Flex Duct, it meets all requirements of the U.L. 181 test standard as a Class 1 air duct in accordance with NFPA 90A and 90B, and Uniform Mechanical Code that is L.A. City approved. (Research Report #RR7649). This versatile product is designed for low velocity commercial, industrial, and residential applications where sound attenuations is important.

* Meets all requirements of U.L. 181 test standard, and is listed as a Class 1 air duct in accordance with NFPA 90A, 90B and Uniform Mechanical Code that is L.A. City approved. (Research Report #RR7649).

I called trying to find out what happened to the rest of my order and was surprised to hear a warm and kind voice willing to do whatever it takes to find answers and follow through with her promise. Amanda is an asset worth holding on to and a credit to your company. She was very professional, helpful and courteous while assisting me with my order. I would most definitely assign her an A+ in customer service."
Donald "Brad" Thomas

I would like to thank you for your hard work in getting us our part in a timely fashion. You were very helpful and you understood the severity of the situation and did a wonderful job in getting the part to us. Thanks again and please share this with your boss! You were outstanding!"
Todd Mills